

# 自定义过滤器
import functools
from flask import current_app
from flask import g
from flask import session

from info.models import User


def index_filter(index):
    if index == 0:
        return 'first'
    elif index == 1:
        return 'second'
    elif index == 2:
        return 'third'
    else:
        return ''

def login_required(f):
    @functools.wraps(f)
    def wrapper(*args,**kwargs):
        # redis获取user_id
        user_id = session.get('user_id')
        # 如果use——id存在，查询mysql
        user = None
        if user_id:
            try:
                user = User.query.get(user_id)
            except Exception as e:
                current_app.logger.error(e)
        g.user = user
        return f(*args,**kwargs)
    # wrapper.__name__ = f.__name__
    return wrapper